Frequencies for first 10,000 rows of retprn variable in nhamcsopd2002 dataset :

  return as |
     needed |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,054       80.54       80.54
          1 |      1,946       19.46      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016